whitlock



Uivr'rnn .Stearns reim* @einen 1 LEIVIS L. IVHITLOOK, OF BROOKLYN, NEWYORK.

IMPROVEMENT IN DROP-HAMMRS.

Sprc'ii vation forming part of Letters Patent No. E', dated March 24,1874; application filed May 29, 1873.

To all whom it may' concern:

Be it known that I, Lnwrs L. WHrrLocK, of Brooklyn, Kings county andState of New York, have invented an Improved Lifting Device, of whichthe following is a specication:

lll y invention relates and is applicable to drop and trip hammersespecially, but it may be also applicable to a variety of otherpurposes, as pile-driving and the like. My invention consists in themachinery hereinafter more particularly described, reference being hadto the drawings, Sheets l and 2, forming part of this specification, inwhich like letters refer to like parts.

Figure l, Sheet 1 is a perspective view of a machine embodying myinvention. Fig. 2, Sheet 2, represents the device for holding the hammersuspended at any desired point. Fig.

shows the device for throwing` and keeping v Shaft A is thrown forwardand into contact with wheel C by an elbow-lever, T T', operated by andconnected to a treadle or handlcver by wire rope U. Upon shaft D,carrying said wheel O, is attached a friction-roller, E. This shaft hasstationary bearings, and drives the movable friction-roller F at thesame speed by the four gear-wheels c, f, g, and h.. These latter are sofastened together by links 7a 7c' as to allow the roller F to move uponits shaft G, having also stationary bearings in the frame A. m m' areoscillating bearings upon shaft G, and carry the shaft d, on which isfastened the roller F. The strap I, to'which is attached hammer H, isheld by friction firmly between rollers E and F. The heavier the hammerthe firmer the bite of said rollers upon the strap. To disengage theserollers with their hold upon the strap, a rod, L, is attached to theoscillating bearings m m', or either of them. When hammer H is raisedsufciently, a clamp, K, adjustable upon strap I, comes in contact withthe rod L, elevates roller F, (shown in Fig. 2,) and allows the hammerto drop. Instead of operating` the lifting-rod L and its roller Fautomatically by means of the stop K, the said roller F may be raised bya treadlelever handle, or an yl suitable equivalent. To prevent roller Ffrom falling again into contact with Acontact with strap I and roll E,upon which the hammer again ascends. Thus it will act automatically aslong as wheel C is driven.

-I do not propose limiting myself to this method of operating the wheelO, as I may elect between operating said wheel C by friction with thepinion B, or byv direct belt attachment to the wheel C; or the wheel Oand pinion B may engage by gearing, or any other suitable device.

I/Vhen it is desired to hold suspended the hammer H, the mechanism shownin Fig. 3 is used. This consists of a loose roller, Y, on one side ofstrap I, acting in connection with another roller, K, hungeccentrically. The eccentric is operated by the crank Z', attached to atreadle (not shown) bymeans of the rod Z. The weight of the crank andits attachments, rod, treadle, &c., is enough to keep the eccentric justin contact with strap I while ascending 5 but as soon as the weightbegins to fall it is held by the cam or eccentric roll X at the will ofthe operator, it being disengaged by pressure upon the treadle, It maybe attached anywhere to the stra-p I, either above or below the rolls EF.

This holding device last described is not necessarily a part of thisparticular mechanism, although an important adjunct thereof, but may beadapted as a holder for any other suspended weight, as elevators andhammersy of allkinds.

Instead of the eccentric X, an oscillating boX like the roll F in Fig. 2may be employed as an equivalent.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The roller I", oscillating upon the shaft G, in combination withroller E, strap I, and hammer H, substantially as described.

2. The oscillating` roller F, in combination with roller E, gear-Wheelse, f, g, and h, links k k', and strap I, With its hammer H,substantially asset forth.

3. The roller F, With its Oscillating frame m m and rod L, incombination With the strap I, hammer H, and clamp stop K, substantiallyas set forth.

4. The roller F, with its oscillating frame,

connecting* gearing e f g h, links k k', and rod L, in combination withhammer H and stop K, substantially as described.

5. In combination with roller F and its frame m m', the Weighted cam VV', or its equivalent, substantially as described.

6. Thewheel C and ro1lsEandI `,With frame m m', in combination with rodL, stop K, strap I, and hammer H, substantially as described.

7. In combination with the subject-matter of the preceding` claim, thelatching mecha-nA ism V V and rod IV, or equivalent, substantially asherein described.

LEXVISL. WHITLOCK.

Witnesses:

JAMES S. GRINNELL, THos. JEWELL.

